Practice Test Geeks(CVP) Cardiovascular Perfusionist Practice Test
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Cardiopulmonary Bypass Flashcards

6 cards from real CVP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Cardiopulmonary Bypass flashcards as text

  1. What is the primary function of a cardiopulmonary bypass machine?

    Answer: To temporarily replace the function of the heart and lungs during surgery

    The CPB machine takes over circulation and gas exchange, allowing the surgeon to operate on a still, bloodless heart.

  2. What anticoagulant is most commonly used during cardiopulmonary bypass?

    Answer: Heparin

    Heparin is the standard anticoagulant used during CPB because of its rapid onset, effectiveness, and reversibility with protamine.

  3. What is the activated clotting time (ACT) target range during cardiopulmonary bypass?

    Answer: Greater than 480 seconds

    An ACT greater than 480 seconds ensures adequate anticoagulation to prevent clot formation in the bypass circuit.

  4. What is the role of the oxygenator in the bypass circuit?

    Answer: To add oxygen and remove carbon dioxide from the blood

    The oxygenator functions as an artificial lung, performing gas exchange by adding oxygen and removing carbon dioxide.

  5. What is hemodilution during cardiopulmonary bypass?

    Answer: Dilution of blood with crystalloid or colloid priming solutions reducing hematocrit

    Hemodilution occurs when the circuits priming volume mixes with the patients blood, lowering the hematocrit and viscosity.

  6. What drug is used to reverse heparin after cardiopulmonary bypass?

    Answer: Protamine sulfate

    Protamine sulfate binds to heparin and neutralizes its anticoagulant effect, restoring normal coagulation after bypass.

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